JEE · NEET Previous Year Question
Which of the following factors may be regarded as the main cause of lanthanide contraction?
Topic: JEE PYQ
Answer: D. Full step-by-step solution below.
- AGreater shielding of 5d electrons by 4f electrons
- BPoorer shielding of 5d electron by 4f electrons
- CEffective shielding of one of 4f electrons by another in the sub-shell
- DPoor shielding of one of 4f electron by another in the sub-shell.
Correct answer: D
Solution
(d) Lanthanide contraction is due to poor shielding of one of 4ƒ electron by another in the sub-shell.More d- and f-Block Elements PYQs
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